Fibrous composition of matter.



--- Galciunih-esinate.

UNITED STATES PATENT OFFICE.-

JOHN A. JUST, OF SYRACUSE, NEW YORK, ASSIGNOR TO THE NATIONAL PACKAGE COMPANY, OF GLENS FALLS, NEW YORK.

FIBROUS COMPOSITION OF MATTER.

SPECIFICATION forming; part of Letters Patent No. 666,806, dated January 29, 1901. Application filed June 27, 1900- Serial No. 21,716. (No specimens.)

To (all whom it may concern:

Be it known that I, JOHN A. JUST, a citizen of the United States, and a resident of Syracuse, in the county of Onondaga and State of New York, have invented a new and useful Improvement in Fibrous Compositions of Matter, of which the following is a specification.

This invention relates to that class of hard and tough fibrous compositions of matter which are composed mainly of a finely-divided fibrous substance and a fusible cementing ingredient, such as rosin, which ingredients are united in a well-known manner by subject ing the dry fiuffy mixture to heat and pressure.

The object of this invention is to increase the toughness and the wearing and waterproof qualities of this kind of compositions.

My improved com position consists of finelydivided or reduced fibrous matter, a mineral filler, and a resinate, preferably combined with an excess of rosin.

In practicing my invention I prepare the desired resinate by melting the rosin and mixing with the same slaked or hydrated lime. Lime combines with rosin in about the proportion of one part of lime to five parts of rosin, by weight, forming resinate of lime or I*pl&f%!,-l1CW5l1 to. use an excess of rosin, about one part, by weight, of lime to twenty parts of rosin, in which case the calcium resinate is dissolved in the excess of rosin. I prefer an excess of rosin because it lowers the melting-point of the mixture somewhat, the melting-point of the pure resinate being rather higher than is desirable. The lime can be mixed with the rosin by dusting slaked lime upon the surface of the melted rosin or by grinding or tumbling the rosin together with the slaked lime and then heating the mixture until the rosin is melted and the lime absorbed. Milk of lime may be used instead of slaked lime, in which case the water is driven off as steam by the heat of the melted rosin. The melting-point of the composition can be regulated by changing the proportion of lime, a greater proportion of lime raising the melting-point. The fiber and the filler are added to the melted resinate and rosin and thoroughly mixed therewith,so that every particle of fiber is thoroughly coated with the resinous material and the interstices are completely filled by the filler. The mixture is now allowed to cool and harden and then crushed or otherwise reduced to a loose flufl'y condition which allows a mixture to be molded 5 5 by heat and pressure in the usual manner into articles of the desired form. I

Instead of calcium resinate some other suitable resinate may be employed-for instance, aluminium resinate or iron resinate. The aluminium resinate can be prepared by saponifying rosin with an alkali, diluting the rosin soap with Water, adding a solution of aluminium sulfate, and washing and drying the precipitated aluminium resinate. This resinate is also preferably used with an excess of rosin-for instance,one part,by weight, of aluminium resinate to ten parts of rosin.

If an iron resinate is desired, the rosin soap is treated with iron sulfate, wherebyiron res- 7o inate is precipitated.

The fibrous material which is employed may vary in accordance with the available supply and the cost of the material .and the character of the articles which are to be produced. WVaste paper, cornstalks, bagasse, palmetto-root,and other vegetable substances may be employed as well as mineral substancesfor instance, asbestos or mica. The

fibrous material is i-e'dnced"in'any suitablefio manner to a fine flufiy or flocky condition.

Any suitable mineral filler may be employed-for instance, ground or pulverized gypsum, plaster-of-paris, burnt or ground clay, or the like.

The fiber, filler, and resinous matter are mixed in any suitable proportion which may vary more or less according to the ingredients which are employed and the goods which are produced. When a mineral fibrous material is employed, the proportion of mineral filler can be greatly reduced. For the manufacture of hollow ware a composition is Well adapted which consists, by weight, of about twenty-four parts of fibrous matter, sixteen 5 parts of mineral filler, and nineteen parts of resinous matter combined with one part of lime.

If a pigment is used for coloring the composition, it should be mixed with the rosin While the latter is in a melted condition.

My improved fibrous composition is very desirable for the manufacture of hollow 2. The herein -described composition of warefor instance, barrels, kegs, pails, and matter consisting of finely-divided fibrous butter-tubs-and also for the manufacture of material, a mineral filler, and rosin combined many other articles of which ahard and tough With"1ime, substantially as set forth.

5 material is required. Witness my hand this 21st day of June, I5

I claim as my invention- 1900. V 1. The herein-described composition of JOHN A. JUST. matter consisting of finely-divided fibrous Witnesses: material, a mineral filler, and rosin combined WILSON R. HARE,

T0 with a base, substantially as set forth. DANIEL H. STRACHAN. 

